Tool
Lighting Size Calculator
Enter your room dimensions to get the perfect fixture diameter recommendation for balanced lighting and aesthetics
Switch to Metric
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Recommended Fixture Size
OPTIMAL FIXTURE DIAMETER
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Enter room dimensions to get personalized recommendation
Fixture Size Reference Guide
- < 100 sq ft → 12-16 inch fixture
- 100-150 sq ft → 16-20 inch fixture
- 150-200 sq ft → 20-24 inch fixture
- 200-300 sq ft → 24-30 inch fixture
- > 300 sq ft → 30+ inch or multi-fixture
Professional Lighting Advice
Fixture diameter should be 1/10 to 1/8 of the room's shorter dimension for optimal lighting balance and visual harmony.
Space Adaptability
For rooms with higher ceilings, consider slightly larger fixtures to fill vertical space and create a cozier atmosphere.
Important Note
This calculator provides general recommendations. Actual selection should consider room layout, natural lighting, and personal preference.